Experimental comparison of the effect of temperature on the vibrational and morphological properties of NixCo3-xO4 nanostructures
This work presents the experimental comparison of the effect of temperature and nickel addition on the synthesis of NixCo3-xO4 nanostructures x = 0.01, 0.04, 0.1, 0.16, using the sol-gel technique with final heat treatment at 600 °C and 800°C. X-ray diffraction (XRD) analysis indicates the formation...
| Autores: | , , , , |
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| Tipo de recurso: | artículo |
| Estado: | Versión aceptada para publicación |
| Fecha de publicación: | 2021 |
| País: | España |
| Institución: | Universidad de Barcelona |
| Repositorio: | Dipòsit Digital de la UB |
| OAI Identifier: | oai:diposit.ub.edu:2445/179432 |
| Acceso en línea: | https://hdl.handle.net/2445/179432 |
| Access Level: | acceso abierto |
| Palabra clave: | Níquel Nanoestructures Cobalt Nickel Nanostructures |
| Sumario: | This work presents the experimental comparison of the effect of temperature and nickel addition on the synthesis of NixCo3-xO4 nanostructures x = 0.01, 0.04, 0.1, 0.16, using the sol-gel technique with final heat treatment at 600 °C and 800°C. X-ray diffraction (XRD) analysis indicates the formation of pure Co3O4 at 600 °C and the appearance of an additional residual NiO phase at 800 °C. The presence of this phase evidences a deviation in the peaks of the diffraction angle to lower ones generated by the difference in ionic radii, which is related to the insertion of larger ions (Ni2+) doped in the matrix of Co3O4. Scanning electron microscope (SEM) analysis indicates that there is a densification of the grains at higher temperatures, possibly associated with the thermal effect that generates greater interdiffusion. Fourier-transform infrared spectroscopy (FTIR) spectra show two main absorption bands with vibrations Co2+¬O, Co3+¬O and Ni¬O in 456 cm-1. The effect of doping generates a displacement in the bands that are evident in the Raman analysis, where the vibrational mode A1g at 600 °C is translated 28.07 cm-1. The values of SBET specific surface area indicate that as temperature increases, the surface area and volume of micropores decreases. |
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